Error emailing all users

I would like to be able to user the email users function so that we can still notify our members of upcoming events and finally migrate away from yahoo groups, but every time I try to email all members (about 80 currently) I get the following error code in the browser and no idea what it did...

An exception occurred: Mysqli prepare error: MySQL server has gone away in /homepages/25/d347617759/htdocs/757-furries/forum/library/Zend/Db/Statement/Mysqli.php on line 77
    Zend_Db_Statement_Mysqli->_prepare() in Zend/Db/Statement.php at line 115
    Zend_Db_Statement->__construct() in Zend/Db/Adapter/Mysqli.php at line 381
    Zend_Db_Adapter_Mysqli->prepare() in Zend/Db/Adapter/Abstract.php at line 478
    Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 825
    Zend_Db_Adapter_Abstract->fetchOne() in XenForo/Error.php at line 50
    XenForo_Error::unexpectedException() in XenForo/Application.php at line 295
Nothing additional gets logged to the server error log

Running xenForo 1.1.1
Host is 1&1 shared hosting


Well-known member
The problem comes from your hosting company, the best method is to contact it.
Maybe the MySQL maximum packet size is too small, even if it seems unlikely with only 80 members.